SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a preliminary treatment solid-liquid separation equipment and method, it adopts to dissolve gas and washs filter unit with the common mode of water, has strengthened cleaning strength, has increased the cleaning performance.
The utility model provides a technical scheme that its technical problem adopted is:
in a first aspect, a pretreatment solid-liquid separation device comprises
The shell component is provided with an inner cavity, a filtering component is arranged in the shell component and divides the inner cavity into an inflow cavity and an outflow cavity, the shell component is provided with a water inlet and a cleaning sewage port which are communicated with the inflow cavity, the water inlet is provided with a first control valve, the cleaning sewage port is provided with a second control valve, and the shell component is provided with a water outlet communicated with the outflow cavity;
the air dissolving chamber is provided with a water inlet connected with the water outlet end, the air dissolving chamber is provided with a water outlet connected with the water outlet pipeline, the water outlet is provided with a third control valve, the air dissolving chamber is provided with an air inlet connected with the air supply pipeline, and the air inlet is provided with a fourth control valve; and
the gas storage tank is provided with a gas outlet, and the gas outlet is connected with the gas supply pipeline.
With reference to the first aspect, in certain implementations of the first aspect, the housing component is cylindrical, the filter component includes a filter screen that is cylindrical, an outflow chamber is formed in an outer side of the filter screen in the inner cavity, an inflow chamber is formed in an inner side of the filter screen, a water inlet port and a cleaning and sewage discharging port that are communicated with the inflow chamber are formed in a bottom of the housing component, and a water outlet end that is communicated with the outflow chamber is formed in a side wall of the housing component.
With reference to the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the top of the housing component is provided with a vent valve.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, a differential pressure sensor is disposed between the water outlet end and the water inlet port.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the pressure sensor further includes a controller electrically connected to the first control valve, the second control valve, the third control valve, the fourth control valve, and the pressure difference sensor, and configured to control operating states of the control valves.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, an air supplement port connected with an air compressor is arranged on the air storage tank, and the air supplement port is provided with a fifth control valve.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a pressure sensor is disposed on the gas storage tank, and the fifth control valve and the pressure sensor are both electrically connected to the controller.
In a second aspect, a pretreatment solid-liquid separation method comprises the following steps:
solid-liquid separation, namely opening a first control valve at a water inlet port of the shell component, opening a third control valve at a water outlet of the dissolved air chamber, closing a second control valve at a cleaning and sewage discharging port of the shell component, closing a fourth control valve at an air inlet of the dissolved air chamber, enabling sewage to flow in from the water inlet port of the shell component, intercepting and filtering through the filtering component, and then discharging through a water outlet end of the shell component;
a pressurizing step, closing a first control valve of a water inlet port of the shell component, closing a third control valve of a water outlet of the gas dissolving chamber, opening a fourth control valve of a gas inlet of the gas dissolving chamber, and enabling gas in the gas storage tank to enter the gas dissolving chamber;
and a back washing step, namely opening a second control valve of the cleaning and sewage discharging port of the shell component, and instantly discharging water in the shell component through the cleaning and sewage discharging port under the action of high pressure.
With reference to the second aspect, in certain implementations of the second aspect, in the solid-liquid separation step, the pressurizing step is started when the operation time or the pressure difference between the water outlet end and the water inlet port reaches a preset value.
With reference to the second aspect and the foregoing implementation manners, in some implementation manners of the second aspect, the method further includes a gas supplementing step of opening a fifth control valve of the gas supplementing port of the gas storage tank, supplementing gas to the gas storage tank through an air compressor, and when the pressure reaches a set pressure value, closing the fifth control valve.
One of the above technical solutions has at least one of the following advantages or beneficial effects:
the air dissolving chamber and the air storage tank for backwashing the filter component are arranged, and the filter component is cleaned in a common mode of dissolved air and water, so that the cleaning strength is enhanced, and the cleaning effect is improved.
Meanwhile, by combining the backwashing mode, the filtering component can more precisely filter the sewage, can intercept the functions of fine sand, fiber substances and other fine solid substances in the sewage, reduces the load of filtering and purifying of the membrane bioreactor, shortens the pretreatment flow at the front end of the membrane bioreactor, prolongs the cleaning period of the membrane bioreactor, and reduces the investment and maintenance cost.
In addition, the pretreatment solid-liquid separation device is provided with a dissolved air chamber at the water outlet end of the shell component, and filtered water is used as a backwashing water source, so that equipment is reduced, and cleaning water is saved.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it is not intended to indicate or imply that the technical features indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, "a plurality" means one or more, "a plurality" means two or more, "more than", "less than", "more than", and the like, which means that the number is not included; the terms "above", "below", "within" and the like are to be understood as including the number. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
Referring to fig. 1, an embodiment of the present invention provides a pretreated solid-liquid separation device, comprising a housing member 5, a gas dissolving chamber 13 and a gas storage tank 16, wherein,
the shell component 5 is provided with an inner cavity, the filter component 9 is arranged in the shell component 5, the inner cavity is divided into an inflow chamber 6 and an outflow chamber 7 by the filter component 9, the shell component 5 is provided with a water inlet port 2 and a cleaning and sewage discharging port 1 which are communicated with the inflow chamber 6, when solid-liquid separation is carried out, sewage enters the inner cavity from the water inlet port 2 and then enters the inflow chamber 6, is intercepted by the filter part 9 and then enters the outflow chamber 7, the water inlet port 2 is provided with a first control valve 4, used for controlling the opening and closing of the water inlet port 2, when solid-liquid separation is carried out, the first control valve 4 is opened, when back washing is carried out, the first control valve 4 is closed, the cleaning and sewage discharging port 1 is provided with a second control valve 3, used for controlling the opening and closing of the cleaning and sewage draining port 1, when solid-liquid separation is carried out, the second control valve 3 is closed, when back washing is carried out, the second control valve 3 is opened, and the shell component 5 is provided with a water outlet end 11 communicated with the outflow cavity 7;
the gas dissolving chamber 13 is separately arranged or directly arranged on a water outlet pipeline of the shell component 5, the gas dissolving chamber 13 is provided with a water inlet connected with the water outlet end 11, the gas dissolving chamber 13 is provided with a water outlet connected with the water outlet pipeline, the filtered water flows into the gas dissolving chamber 13 from the water outlet end 11 and further flows out from the water outlet during solid-liquid separation, the water outlet is provided with a third control valve 15 for controlling the opening and closing of the water outlet, the third control valve 15 is opened during solid-liquid separation, the third control valve 15 is closed during back flushing, the gas dissolving chamber 13 is provided with a gas inlet connected with a gas supply pipeline, the gas inlet is provided with a fourth control valve 14, the fourth control valve 14 is used for controlling the opening and closing of the gas inlet, the fourth control valve 14 is closed during solid-liquid separation, and the fourth control valve 14 is opened during back flushing to flush gas into the gas dissolving chamber 13; and
and the gas storage tank 16 is used for storing high-pressure gas, a gas outlet is formed in the gas storage tank 16 and is connected with a gas supply pipeline, and the high-pressure gas in the gas storage tank 16 can enter the gas dissolving chamber 13 through the gas supply pipeline so as to pressurize and dissolve the air into the backwashing water by utilizing the pressure of the gas storage tank 16 before the filtering part 9 is cleaned. During backwashing, the kinetic energy of the backwashing water can be increased by pressurizing the water in the dissolved air chamber 13 by the gas pressure of the gas tank 16. Meanwhile, an air inlet pipe is arranged above the air dissolving chamber 13, compressed air of the air storage tank 16 is used for pressurizing the air dissolving chamber 13 before backwashing, the solubility of air in water can be increased, during backwashing, the pressure in the shell component 5 is quickly released, and the water with dissolved air releases the dissolved air at the moment of contacting with the filter screen to impact the surface of the filter screen to enhance the cleaning effect of the filter screen.
The working principle of this embodiment is:
when the solid-liquid separation of the sewage is carried out, the sewage flows into the inflow chamber 6 through the water inlet port 2, passes through the filtering component 9 from the inflow chamber 6, and impurities in the sewage are intercepted and intercepted on the filtering component 9, so that the solid-liquid separation of the sewage is realized.
When the filter element 9 needs to be cleaned completely, the first control valve 4 on the water inlet port 2 and the third control valve 15 on the air dissolving chamber 13 are closed, the fourth control valve 14 is opened, and the second control valve 3 is opened after the air inlet valve is completely opened. After the second control valve 3 is opened, the pressure in the shell component 5 is instantly reduced, the dissolved air water in the dissolved air chamber 13 is quickly pressed into the shell component 5, the dissolved air is released in the process of contacting with the filtering component 9, the surface of the filtering component 9 is impacted, the pressure water quickly filters the filtering component 9 under the action of pressure, impurities on the filtering component 9 are washed under the combined action of the dissolved air and the pressure water, and the impurities are discharged outwards through the second control valve 3, so that the backwashing effect is greatly improved. The filter part 9 is cleaned by adopting a mode of cleaning by both dissolved air scrubbing and pressure water back flushing, so that the cleaning strength is increased, and the cleaning effect is improved.
After the backwashing is completed, the fourth control valve 14 is closed, then the second control valve 3 is closed, and finally the first control valve 4 and the third control valve 15 are opened, and the filtering program is started.
The gas dissolving chamber 13 and the gas storage tank 16 for backwashing the filter unit 9 are arranged, and the filter unit 9 is cleaned in a common mode of gas dissolving and water, so that the cleaning strength is enhanced, and the cleaning effect is improved.
Meanwhile, by combining the backwashing mode, the filtering component 9 can more precisely filter the sewage, can intercept the functions of fine sand, fiber substances and other fine solid substances in the sewage, reduces the load of filtering and purifying of the membrane bioreactor, shortens the pretreatment flow at the front end of the membrane bioreactor, prolongs the cleaning period of the membrane bioreactor, and reduces the investment and maintenance cost.
In addition, the pretreatment solid-liquid separation device is provided with a dissolved air chamber 13 at the water outlet end 11 of the shell component 5, and filtered water is used as a backwashing water source, so that equipment is reduced, and cleaning water is saved.
The shell component 5 is square, round or special-shaped, the filtering component 9 can adopt a grating, a filter screen, a pore plate and the like, preferably, referring to fig. 1, the shell component 5 is cylindrical, the filtering component 9 comprises a cylindrical filter screen, an outflow cavity 7 is formed on the outer side of the filter screen in an inner cavity, an inflow cavity 6 is formed on the inner side of the filter screen, the cylindrical filter screen can obtain a larger filtering area, the space is saved, and the filtering efficiency is improved.
Referring to fig. 1, in order to match the cylindrical filter screen and the housing member 5, the bottom of the housing member 5 is provided with a water inlet port 2 and a cleaning and sewage discharging port 1 which are communicated with the inflow chamber 6, the water inlet port 2 and the cleaning and sewage discharging port 1 can be converged into one path before being connected into the inflow chamber 6, namely, the water inlet port and the cleaning and sewage discharging port are used as a water inlet and a sewage discharging outlet, and have double functions, and the side wall of the housing member 5 is provided with a water outlet end 11 communicated with the outflow chamber 7.
Referring to fig. 1, an exhaust valve 10 is arranged at the top of the shell component 5, after backwashing is completed, the fourth control valve 14 is closed, then the second control valve 3 is closed, finally the first control valve 4 and the third control valve 15 are opened, a filtering process is carried out, sewage enters the inner cavity of the shell component 5 again, and air in the shell component 5 is exhausted through the exhaust valve 10 above the shell component when filtering is started.
Sundries intercepted by the filtering component 9 are continuously accumulated on the front side of the filtering component 9, and after the running time reaches a preset value, backwashing is started. In some embodiments, referring to fig. 1, a differential pressure sensor 12 is disposed between the backwash water outlet 11 and the water inlet 2, and when the differential pressure reaches a predetermined value, the backwash is started.
Each control valve can be controlled manually or automatically through control, for example, in some embodiments, the control device further includes a controller electrically connected to the first control valve 4, the second control valve 3, the third control valve 15, the fourth control valve 14 and the differential pressure sensor 12 and controlling the working state of each control valve, and the controller controls the opening and closing of the first control valve 4, the second control valve 3, the third control valve 15 and the fourth control valve 14 according to signals of time, the differential pressure sensor 12 and the like so as to control the filtering or backwashing process.
Referring to fig. 1, the air storage tank 16 is provided with an air supplement port connected to the air compressor for supplementing air to the air storage tank 16 after backwashing, and the air supplement port is provided with a fifth control valve 18. After the fourth control valve 14 is closed, the pressure sensor on the air storage tank 16 detects the pressure of the air storage tank 16, if the pressure is lower than the set value, the fifth control valve 18 is opened to supply air to the air storage tank 16 until the pressure reaches the set value, and the fifth control valve 18 is closed.
Referring to fig. 1, a pressure sensor 17 is disposed on the air storage tank 16, and the fifth control valve 18 and the pressure sensor 17 are electrically connected to the controller. The gas pressure in the gas tank 16 can be controlled as required to change the amount of dissolved gas in the backwash water and the backwash pressure.
Referring to fig. 2, an embodiment of the present invention provides a pretreatment solid-liquid separation method, including the following steps:
solid-liquid separation, namely opening a first control valve 4 of a water inlet port 2 of a shell component 5, opening a third control valve 15 of a water outlet of a dissolved air chamber 13, closing a second control valve 3 of a cleaning and sewage discharging port 1 of the shell component 5, and closing a fourth control valve 14 of an air inlet of the dissolved air chamber 13, wherein sewage flows in from the water inlet port 2 of the shell component 5, is intercepted and filtered by a filtering component 9, and is discharged from a water outlet end 11 of the shell component 5;
a pressurizing step of closing the first control valve 4 of the water inlet port 2 of the shell component 5, closing the third control valve 15 of the water outlet of the gas dissolving chamber 13, opening the fourth control valve 14 of the gas inlet of the gas dissolving chamber 13, and allowing the gas in the gas storage tank 16 to enter the gas dissolving chamber 13;
and a back washing step, wherein the second control valve 3 of the cleaning sewage discharge port 1 of the shell component 5 is opened, and water in the shell component 5 is discharged through the cleaning sewage discharge port 1 instantly under the action of high pressure.
The filter part 9 is cleaned by adopting a common mode of dissolved air and water, so that the cleaning strength is enhanced, and the cleaning effect is improved.
Meanwhile, by combining the backwashing mode, the filtering component 9 can more precisely filter the sewage, can intercept the functions of fine sand, fiber substances and other fine solid substances in the sewage, reduces the load of filtering and purifying of the membrane bioreactor, shortens the pretreatment flow at the front end of the membrane bioreactor, prolongs the cleaning period of the membrane bioreactor, and reduces the investment and maintenance cost.
In addition, the pretreatment solid-liquid separation device is provided with a dissolved air chamber 13 at the water outlet end 11 of the shell component 5, and filtered water is used as a backwashing water source, so that equipment is reduced, and cleaning water is saved.
Wherein, after the operation time or the pressure difference between the water outlet end 11 and the water inlet port 2 reaches a preset value, for example, the operation pressure difference is controlled to be 0-50kpa, the operation time is controlled to be 30 min, and the pressurizing step is started.
Referring to fig. 2, the method further includes a gas supplementing step, in which the fifth control valve 18 of the gas supplementing opening of the gas storage tank 16 is opened, the gas is supplemented to the gas storage tank 16 through the air compressor, and when the pressure reaches a set pressure value, for example, 0.3-0.6Mpa, the fifth control valve 18 is closed.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.